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Gravity-induced Solidification Segregation and Its Effect On Dendrite Growth in Al-2.8 Wt.% Cu Alloy
Kong, Yafei1,2; Luo, Xinghong1; Li, Yang1; Liu, Shi1
Corresponding AuthorLuo, Xinghong(xhluo@imr.ac.cn)
2021-12-01
Source PublicationMICROGRAVITY SCIENCE AND TECHNOLOGY
ISSN0938-0108
Volume33Issue:6Pages:11
AbstractThe solidification experiments of Al-2.8 wt.% Cu alloy were conducted under both microgravity and normal gravity conditions by using a 50-m-high drop tube. The solidification microstructure and element distribution were analyzed by using OM, EBSD and EPMA. Columnar dendrites were found growing epitaxially from the seeds during solidification under both microgravity and normal gravity conditions. Comparatively, the primary dendrite spacing and secondary dendrite spacing formed under microgravity condition were smaller, and the deviation angle between growth direction and the preferred crystal orientation < 001 > was smaller. Cu content in the center region of 1g sample is always higher than that of mu g sample, and shows a characteristic of high in the middle and low at the edges along radial directions. While the Cu content in mu g sample seems to display an opposite trend in the distribution along radial directions, and has a smaller wave amplitude. Microsegregation of Cu exists in both 1g sample and mu g sample, and basically presents a gradually decreasing trend with the increase of solidification distance. Nevertheless, the degree of microsegregation in mu g sample is always lower. The above results suggest that under normal gravity condition, Cu element had a trend to enrich to central area under the effect of convection, and therefore, might contribute to enlarge dendrite spacing and increase microsegregation in that area.
KeywordAl-Cu alloy Drop tube Microgravity Dendrite Solidification
Funding OrganizationChina manned space engineering
DOI10.1007/s12217-021-09913-4
Indexed BySCI
Language英语
Funding ProjectChina manned space engineering[TGJZ800-2-RW024]
WOS Research AreaEngineering ; Thermodynamics ; Mechanics
WOS SubjectEngineering, Aerospace ; Thermodynamics ; Mechanics
WOS IDWOS:000730170700001
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/167314
Collection中国科学院金属研究所
Corresponding AuthorLuo, Xinghong
Affiliation1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Kong, Yafei,Luo, Xinghong,Li, Yang,et al. Gravity-induced Solidification Segregation and Its Effect On Dendrite Growth in Al-2.8 Wt.% Cu Alloy[J]. MICROGRAVITY SCIENCE AND TECHNOLOGY,2021,33(6):11.
APA Kong, Yafei,Luo, Xinghong,Li, Yang,&Liu, Shi.(2021).Gravity-induced Solidification Segregation and Its Effect On Dendrite Growth in Al-2.8 Wt.% Cu Alloy.MICROGRAVITY SCIENCE AND TECHNOLOGY,33(6),11.
MLA Kong, Yafei,et al."Gravity-induced Solidification Segregation and Its Effect On Dendrite Growth in Al-2.8 Wt.% Cu Alloy".MICROGRAVITY SCIENCE AND TECHNOLOGY 33.6(2021):11.
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